Frozen embryos give bouncier babies

时间：2019-03-01 01:10:00166网络整理admin

FROZEN embryos do better than fresh. That’s the surprising conclusion of a study of children conceived by IVF which set out to address concerns that freezing might harm embryos. Anja Pinborg of Copenhagen University Hospital in Denmark studied more than 1200 children born in the country between 1995 and 2006 as a result of IVF using frozen embryos and compared them with almost 18,000 children born after conventional IVF using fresh embryos. The frozen embryos produced babies of roughly normal birth weight, while those from conventional IVF were on average about 200 grams lighter,